re PR c/84721 (ICE in c_push_function_context, at c-decl.c:9667)

	PR c/84721
	* c-parser.c (add_debug_begin_stmt): Don't add DEBUG_BEGIN_STMT if
	!building_stmt_list_p ().

	* gcc.dg/pr84721.c: New test.

From-SVN: r258302

gcc/c/ChangeLog

+2018-03-06  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c/84721
+	* c-parser.c (add_debug_begin_stmt): Don't add DEBUG_BEGIN_STMT if
+	!building_stmt_list_p ().
+
 2018-02-13  Richard Sandiford  <richard.sandiford@linaro.org>
 
 	PR c/84305

gcc/c/c-parser.c

@@ -1654,7 +1654,8 @@ static void c_finish_oacc_routine (struct oacc_routine_data *, tree, bool);
 static void
 add_debug_begin_stmt (location_t loc)
 {
-  if (!MAY_HAVE_DEBUG_MARKER_STMTS)
+  /* Don't add DEBUG_BEGIN_STMTs outside of functions, see PR84721.  */
+  if (!MAY_HAVE_DEBUG_MARKER_STMTS || !building_stmt_list_p ())
     return;
 
   tree stmt = build0 (DEBUG_BEGIN_STMT, void_type_node);

gcc/testsuite/ChangeLog

 2018-03-06  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c/84721
+	* gcc.dg/pr84721.c: New test.
+
 	PR target/84710
 	* gcc.dg/pr84710.c: New test.
 

gcc/testsuite/gcc.dg/pr84721.c

+/* PR c/84721 */
+/* { dg-do compile } */
+/* { dg-options "-g -O2" } */
+
+int a[({ int b })];		/* { dg-error "braced-group within expression allowed only inside a function" } */
+int c[({ int d () {}; })];	/* { dg-error "braced-group within expression allowed only inside a function" } */